33 Guests, 1 User
Wittsend

Author Topic: 1975 pinto new rebuild no power  (Read 4108 times)

0 Members and 1 Guest are viewing this topic.

Offline theeges

  • Pinto Driver
  • *
  • Posts: 3
  • FeedBack: +0/-0
  • Another Pinto Driver

  • Total Badges: 1
    Badges: (View All)
    Topic Starter
1975 pinto new rebuild no power
« on: September 02, 2012, 09:52:18 AM »
Hi all, new to this site and am hoping for some help. Recently I rebuilt a 1975 ford 2.3l with manual transmission to put in a kit car. I searched the web and came up with 6 degrees btc at 550 rpm for the static timing. since then it has run like a dog. small hills bog it down and it seems to act like it is running rich with an intermittent miss at idle. The carburator is a holley 2bbl 350 cfm. when I step on the gas it bogs down like the vaccuum advance doesnt work, and I smell gas. I have checked the advance to see if it works with a timing light and it seems to advance more than the mechanical advance does. It could use a rebuild on the carb, but the spark plugs have the tan discoloration like it is running all right. So far the engine has about 300 miles on it and I would like to find out if something can be done to make it run better before I screw it up and have to start all over again

Thanks!
Dan

Offline 78_starsky

  • Pinto Sr. Member
  • ****
  • Posts: 400
  • FeedBack: +21/-0
  • Forever Learning

  • Total Badges: 3
    Badges: (View All)
    Topic Starter Fifth year Anniversary Windows User
Re: 1975 pinto new rebuild no power
« Reply #1 on: September 02, 2012, 11:07:36 AM »
hi,  could you have your timing out 180 degrees?

Offline oldkayaker

  • Pinto Sr. Member
  • ****
  • Posts: 739
  • FeedBack: +113/-0
  • Gender: Male

  • Total Badges: 5
    Badges: (View All)
    Topic Starter Signature Windows User Tenth year Anniversary Fifth year Anniversary
Re: 1975 pinto new rebuild no power
« Reply #2 on: September 02, 2012, 01:44:07 PM »
See links below for some of the 350/500cfm 2bbl Holley threads for jet and power valve recommendation s.  Racer Walsh advertises a power valve modification kit that is reported to be helpful, search for "carb restrictor" on this link: http://www.racerwalsh.zoovy.com/category/4cylinder/
 
http://www.fordpinto.com/your-pintos/holley-350-or-500-for-my-2-0/msg114654
http://www.fordpinto.com/general-help/holley-350-issues
http://www.fordpinto.com/general-help/holley-500-on-a-2-0-pinto/msg84977
http://static.zoovy.com/merchant/racerwalsh/Back_2_Basics_Sheet.doc
 
Not familiar with the 75 timing control to know if what you described is normal or not.  Hopefully somebody else will.
Jerry J - Jupiter, Florida

Offline 71pintoracer

  • Pinto Master
  • *****
  • Posts: 1302
  • FeedBack: +37/-0
  • Gender: Male
  • '71 Pinto 5.0 T-5 = lotsa fun!

  • Total Badges: 8
    Badges: (View All)
    Mobile User Tenth year Anniversary Topic Starter Signature Poll Voter 1000 Posts Fifth year Anniversary Photographer
Re: 1975 pinto new rebuild no power
« Reply #3 on: September 04, 2012, 01:42:21 PM »
I used the restricor kit on my 4cyl car and it works good. I always ran 10 * BTDC for static timing but my guess is the cam timing is off. I posted a thread on here years ago on how to check and adjust cam timing, maybe someone can find it and post a link. Cam timing is critical on these engines.
If you don't have time to do it right, when will you have time to do it over?

Offline Pinturbo75

  • Pinto Sr. Member
  • ****
  • Posts: 722
  • FeedBack: +26/-0
  • Gender: Male

  • Total Badges: 6
    Badges: (View All)
    Topic Starter Signature Tenth year Anniversary Poll Voter Windows User Fifth year Anniversary
Re: 1975 pinto new rebuild no power
« Reply #4 on: September 04, 2012, 06:10:02 PM »
i too agree on the cam timing being off..... one tooth makes a hugh difference...
75 turbo pinto trunk, megasquirt2, 133lb injectors, bv head, precision 6265 turbo, 3" exhaust,bobs log, 8.8, t5,, subframe connectors, 65 mm tb, frontmount ic, traction bars, 255 lph walbro,
73 turbo pinto panel wagon, ms1, 85 lb inj, fmic, holset hy35, 3" exhaust, msd, bov,

Offline theeges

  • Pinto Driver
  • *
  • Posts: 3
  • FeedBack: +0/-0
  • Another Pinto Driver

  • Total Badges: 1
    Badges: (View All)
    Topic Starter
Re: 1975 pinto new rebuild no power
« Reply #5 on: September 05, 2012, 09:10:03 AM »
Thanks guys! I have ordered the car restrictor kit and will try the #56 jets that were suggested on that website. Also I figure I will be taking the valve cover off soon to check head bolt torque, so I will check to see if I'm off a tooth while doing that. Thanks in advance, let's all cross our fingers now! Ha.

Offline ToniJ1960

  • Pinto Sr. Member
  • ****
  • Posts: 544
  • FeedBack: +13/-0
  • Gender: Female
  • Another Pinto Driver

  • Total Badges: 5
    Badges: (View All)
    Tenth year Anniversary Topic Starter Poll Voter Fifth year Anniversary Windows User
Re: 1975 pinto new rebuild no power
« Reply #6 on: September 14, 2012, 03:23:07 PM »
 no news on this?

Offline theeges

  • Pinto Driver
  • *
  • Posts: 3
  • FeedBack: +0/-0
  • Another Pinto Driver

  • Total Badges: 1
    Badges: (View All)
    Topic Starter
Re: 1975 pinto new rebuild no power
« Reply #7 on: September 16, 2012, 07:34:29 AM »
Hi again all, I have finally fixed the problem. I sent away for the carb restrictor kit and installed it along with rebuilding carb and tried some #58 jets. no change in the performance of the engine, so this weekend I checked the alignment of the timing marks. That was where the problem was. On the cam sprocket there is a drill point about 3/8" dia, on one of the "legs" of the sprocket, but no dot or line or arrow or anything on the teeth. Being the dork that I am I just assumed that the drill point was the mark and lined up on it. The auxillary shaft sprocket has this same mark and nothing on the teeth also, so it wasn't like I used the wrong sprocket. After lining up the cam to be at TDC and making my own mark I found out It was 2 teeth off!!! I lined it up right, put it back together, fired it up, set timing to 6 degrees @ 550 rpm, and took it for a ride...... WOW what a difference!!! I can actually take off from a stop sign without feathering the clutch, and it accellerates when I step on the gas without it wanting to cough, choke, and die! I was wanting to get rid of this car but now all I wanna do is drive it! Thanks so much for all your help guys!